中子数 zhōng zǐ shù

DEFINITIONS

  1. neutron number

CHARACTERS

中 zhōng
HSK 1
central; center, middle; in the midst of; hit (target); attain
子 zǐ
HSK 1
offspring, child; fruit, seed of; 1st terrestrial branch
数 shù
HSK 3
number; several, count; fate